KEEN gave the Boulder Canyon Crew Mid Socks precisely engineered air-flow sections to keep your feet from overheating when youAAAre on the trail this summer. A combination of merino wool, nylon, and synthetic fabrics ensures dry, warm, comfortable feet in a wide range of temperatures.

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Backcountry.com
refers to the men's version

When veering off-road is your tendency, the Keen Boulder Canyon Crew Mid Socks for men adds cushioning across the entire foot as your footwear seeks traction. An anatomical flex system maintains the perfect fit, while air panels provide essential air conditioning.